Try this
Code:
program:
strcmp(
field('#keep_read'), 'yes',
'No',
strcmp(
field('#read_status'), 'N',
'No',
'Yes',
'No'),
'No')
This one works too.
Code:
program:
test(
and(
strcmp(field('#keep_read'), 'yes', '', 1, ''),
strcmp(field('#read_status'), 'N', '', 1, '')
),
'Yes',
'No');